Only one file uploads at a time?

When trying to upload files, I go to the "ADD FILES" box. But only one file at a time could be added to the box. When I selected several at a time, none showed up there. Once I got them all listed in the box, they all did upload.

I have just upgraded to v2.0.996. I did find this bug report from someone else, and the reply said it was fixed in a prior version to the one I am using. Please advise. This is a frustrating problem when there are lots of files to upload!

Thank you.